EP 2233915 A1 20100929 - System and method for detecting water vapor within natural gas using harmonic spectroscopy
Title (en)
System and method for detecting water vapor within natural gas using harmonic spectroscopy
Title (de)
System und Verfahren zur Detektion von Wasserdampf in Erdgas unter Verwendung der harmonischen Spektroskopie
Title (fr)
Système et procédé de détection de vapeur d'eau dans un gaz naturel en utilisant la spectroscopie harmonique
Publication
Application
Priority
- EP 04710166 A 20040211
- US 68872303 A 20031016
Abstract (en)
A technique for detecting water vapor in natural gas is disclosed, wherein a light source (519), e. g., tunable diode laser, VCSEL, color center laser, or quantum cascade laser, emits light modulated at a given frequency and having a wavelength corresponding to a single absorption line where water molecules absorb light at a substantially greater level than methane, e. g., 920 to 960 nm, 1.877 to 1.901 micron, or 2.711 to 2.786 micron, into a sample of natural gas, the intensity of light transmitted through said sample is detected by a detector (523), and the water vapour content is determined by processing electronics (531) from said detected intensity using harmonic spectroscopy. Optionally, a second value for the water vapour content is simultaneously determined using a chemical sensor.
IPC 8 full level
G01N 21/35 (2006.01); G01N 21/39 (2006.01)
CPC (source: EP US)
G01J 3/4338 (2013.01 - EP US); G01N 21/3504 (2013.01 - EP US); G01N 21/3554 (2013.01 - EP US); G01N 21/39 (2013.01 - EP US); G01N 21/05 (2013.01 - EP US); G01N 2021/354 (2013.01 - EP US); G01N 2021/399 (2013.01 - EP US)
Citation (applicant)
DR. RANDY; D. MAY ET AL.: "Processing and Calibration Unit for Tunable Diode Laser Harmonic Spectrometers", J. QUANT. SPECTROSC. RADIAT. TRANSFER, vol. 49, 1993, pages 335 - 437
Citation (search report)
- [Y] DE 3413914 A1 19851024 - PIPELINE ENGINEERING GES FUER [DE]
- [XPI] US 6657198 B1 20031202 - MAY RANDY DEAN [US]
- [X] PAIGE M E: "COMMERCIAL GAS SENSING WITH VERTICAL CAVITY LASERS", OSA TRENDS IN OPTICS AND PHOTONICS, WASHINGTON, DC, US, 21 July 1999 (1999-07-21), pages 141 - 143, XP009010410, ISSN: 1094-5695
- [I] HOVDE D C AND PARSONS C A: "WAVELENGTH MODULATION DETECTION OF WATER VAPOR WITH A VERTICAL CAVITY SURFACE-EMITTING LASER", APPLIED OPTICS, OPTICAL SOCIETY OF AMERICA, US LNKD- DOI:10.1364/AO.36.001135, vol. 36, no. 6, 20 February 1997 (1997-02-20), pages 1135 - 1138, XP001148004, ISSN: 0003-6935
- [Y] HOVDE C AND SILVER J A: "Trace Moisture Detection Using Near Infrared Diode Lasers", 2000 DIGEST OF THE LEOS SUMMER TOPICAL MEETINGS. 24-28 JULY 2000, AVENTURA, FL, USA, 2000, Piscataway, NJ, USA, pages 11 - 12, XP002594368, ISBN: 0-7803-6252-7
- [Y] FEHÉR M AND MARTIN P A: "Review: Tunable diode laser monitoring of atmospheric trace gas constituents", SPECTROCHIMICA ACTA PART A, vol. 51, 1995, pages 1579 - 1599, XP002594369
Citation (third parties)
Third party :
US 6657198 B1 20031202 - MAY RANDY DEAN [US]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005047872 A1 20050526; AU 2004290273 A1 20050526; AU 2004290273 B2 20080724; CA 2540395 A1 20050526; CA 2540395 C 20120828; CN 1867820 A 20061122; CN 1867820 B 20130522; EP 1673612 A1 20060628; EP 2233915 A1 20100929; JP 2007509318 A 20070412; JP 2010237221 A 20101021; US 2004079887 A1 20040429; US 2007034802 A1 20070215; US 2007045543 A1 20070301; US 7132661 B2 20061107; US 7339168 B2 20080304; US 7504631 B2 20090317
DOCDB simple family (application)
US 2004003877 W 20040211; AU 2004290273 A 20040211; CA 2540395 A 20040211; CN 200480030414 A 20040211; EP 04710166 A 20040211; EP 10006553 A 20040211; JP 2006535317 A 20040211; JP 2010138451 A 20100617; US 58689706 A 20061025; US 58804906 A 20061025; US 68872303 A 20031016